Alimentary canal and Epithelial duct

Alimentary canal noun - Tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination.

Epithelial duct and alimentary canal are semantically related. In some cases you can use "Epithelial duct" instead a noun phrase "Alimentary canal".

Epithelial duct noun - A bodily passage or tube lined with epithelial cells and conveying a secretion or other substance.

Alimentary canal and epithelial duct are semantically related. Sometimes you can replace phrase "Alimentary canal" with "Epithelial duct", this phrases are similar.